Most workout programs that are given to clients by their personal trainers fall into a body-part split routine, where a muscle or muscle group is worked, then rested, then worked again, then rested, and then worked one more time before moving on to the next exercise. This leads to an awful lot of down time in the workout, and for many clients who are looking to lose weight, not their best approach. The key to weight loss is, of course, creating a calorie deficit that carries over from day to day. the deficit results in weight loss, plain and simple. Part of that fight is nutrition; take in clean calories, watch your plate to see exactly what you are eating, and don't overdo it! Another aspect of the battle is your workouts; sweating it out in the gym helps burn off more calories, and you should be working out to the best of your ability!

Vertical loading in a workout is where rather than focus on one exercise, performing it several times, then moving to a new exercise, you flip things around. Hit one exercise, move to another, and then another, and keep going until you have completed all exercises you plan on doing during your workout. After you finish, return to the first exercise and start over again! There can be some rest between exercises, but really only enough to get there, do some fast setup if necessary, and then hit it! This helps keep your heart rate sky-high, your caloric burn through the roof, and you with your head in the clouds - the endorphin high after your workout combined with your improving body will really make you feel better than ever!

An idea of what vertical loading looks like; this is an all bodyweight workout, but the same principle can (and should be) applied to your weight training as well!